Landmark Permits

If you're not sure if your building is a landmarked building, you can check the status of your property online by clicking here

If you live in a listed building, and you are planning to make any alterations to your windows, you may need the consent of New York City Landmarks Preservation Commission.

However, this consent is not required if you are doing renovations such as re-painting. For more information on whether you need a permit, visit their website to learn which types of work requires a permit. Click here for a link to their website.

This process will normally require researching the history of the building, photographs of the buildings and windows, and a report on the condition of the existing windows.

Architectural drawings may also be required, as well as all the technical specification of any glazing to be used, including details such as astragal widths, window profiles, materials, and window construction methods.

The application process can take between 20 to 30 business days. Although a positive outcome to your application is not guaranteed, with our professional experience and advice, your application is more likely to be successful and to take less time.

As our company offers all the services for sash and casement windows, from full renovation, replacement sashes only, double glazed sashes into existing casements as well as complete replacement, we have no interest in pursuing any particular aspect and will offer genuine practical advice based on your situation and the condition of your existing windows.